US1989451A - Lubricating device - Google Patents

Description

Jan. 29, 1935. F. J. HULL LUBRICATING -.DEVICE Filed March 9, 1928 FlG; 6

Patented Jan. 29, 1935 f 1,989

UNITED STATES PATE T oF'FICE LUBRICATING DEVICE Foster J. Hull, HagerstoWn; Mel., assignor to Henry H. Snelling, Washington, D. C.

'Application March 9, 1928, Serial No 260,399 14 Claims. (Cl. 1824-45) This invention relates to lubricators of the In the drawingz- V g g grease Cup type from which the lubricant is Figure 1 is a side Elevation view of a lubriactor ejected to a bearing by means of a spring Operated in accordance with this invention. piston which forces the lubricant through the Figure 2 is a Vertical S ti nal V w of h discharge passage past a Valve arranged to Conlubricator shown in Figure'l. g trol the rate Of flow of the lubricant. In this lubri Figur 3 is a cr sti nal View ak n n l n cator the piston is provided with an extension the 3-3 of Figure 2. v k end of which projects out of the body of the' Figure 4 isa cross-sectional view taken on line grease cup and provides an indicator as to* the H of Figure 2.

amount of lubricant the cup contains, and the Figure 5 is a cross-sectional View taken online 10' control Valve is mounted on a threaded extension 5 5 of Figure 2.

on the opposite side of the piston and may be ad- Fgure 6 is a diagrammaticv View of a filling sysjusted to permit more or less lubricant to pass it tem for a plura Of lubricatOrS in accordance' by rotating the piston with respect to the Valve With this invention. V

to change the position of the 'Valve in the dis- -Referring to thedrawing the body of the lubri-. 15

charge passage. v cator comprises a cylindrical-'cup 11 provided According to the present improvements the in- With, a rotatable cover 12 and a threaded boss 13' dicator provided by the extension on the piston is having a diScharge passage 4 therethru- The entirely enclosed in a casing so as to keep dirt up p v d a a ber or lubricant at 15.be-'

0 from entering the lubricator and thereby prevent tween the di ch p s and a p n 16v O grit from Wedging between the parts and checkmounted tO recipr t Within the p according ing the operation of the grease piston as might to th amount of lubricant thereinreadily occur in case the lubricator Without such h p s o 6 consists o a; c r metal d k.

a casing was installed for example on a, Sand 17 to which a cup leather 18 may be suitably se-f blast machine. The casing is provided with a glass c ed y means O a ring 9 d fastenngimem- 25 tube surrounding the indioator extension on the b rs uch as cr WS 20 xt ndin th re hru-int piston so that it will be possible to determine he d s 17- T e piston 16 s ui d in the p when to refill the lubricator by observing the by e s Of eXtenSiOnS 21 d 22 011 the pp position of the extension. The lubricator is also and lower Sides respect v y 0f the disk provided it a i b gage for indicating th tension 21 being 'of a polygonal cross section' and 30 position of the feed controlling-Valve ith repass n thru an ap t of t Same hap i spect to the grease piston Whereby it may be adcover 12. Extension 22 has a threaded portion justed for a definite control of the flow of lubri- Or Wo m 23 p n which is mounted a control cant to the bearing which is to be lubricated. Va v .24, E t n n 1 i pr vid d W th a fla Th lub i t i ro ided with tt hm t 25 in the form of a disk secured to its end which 35 for connecting refilling devices thereto such as the is adapt d tO engage the cover 12 before the Ordinary greaseguns or a common system -foie: leather cup 18 reaches the bottom of the lubrifilling a plurality'of such grease cups is provided c t r n extension 22 iS provided W a mto which a grease-gun is attached. In order'to ber 6 t prevent the control Valve 24 from prevent an excessivepress'ure in'a'ny OlBOf .the ing SCreeVYd t Worm A Compresson cups which might Occur durngvthe fimng f a spring 27 IS posltionedbetween the cover 12 and plurality of cups, the extension: on the grease dlsk 17 to fotce mston downwardly mto piston of each lubricator upon which the control Cup eJeCtmg the mbncant Into the bear' ls momted ls also' provided W a Valve he cover 12 is rotatably secured on the cup 11 45 g z g f g by means of a ring 28 which cooperates with anas they are filled With the right amount of lubrimnm gmoves m the cup and m manner to keep the cover from readily coming 01T and cant without interfering with other cups which prevent the entrance f into the cup In the have not been completely These ValVE upper poron of cup a, pring 29 one end 50 V members are so arranged that they will' not in of which is i d th a t m, 31 that'pro; terefere with the flow of lubricant through the jects through an aperture in the cup and is adaptdischarge passages of the lubricators at any time. ed to engage with any one of a series of depres Further features and details of the invention sions 30 in the interior of the flange 33 of the will hereinafter appear. cover. On the exterior of the flange 33 are a, series 55 of numerals 34 corresponding to the depressions 30 and the lubricator cup 11 is provided with an index arrow 35 whereby the angular position of the cover 12 with respect to the cup may be determined and consequently the adjustment of the feeding of the lubricant by the control Valve 24 may be gaged since the piston 16 is caused to turn With the cover 12, and the worm 23, thereby moves the control piston With respect to t'he'plunger.v

In order to prevent. apossible entry of dirt'thru the cover 12 where the extension 21 passes thru it, a casing 36 is arranged to enclose the outer end of the extension 21. The position of the piston is indicated by the position of the end. of

the extension 21 in the casing, 36 as its side Walls' consist of transparent material such asv a' glass tube 37 which is secured betweentthe cover 12and an end'plate 38 by means of bolts 39 extending thru the plate 38 and into the cover 12. The bolts 39 also protect the glass tube 37 to a great extent as will readily be observed.

' In order to move the control Valve 24 with respect to the piston a plurality of Wings 40 extend from its sidesinto grooves 41 in the passage 14 which prevent the control Valve 24 from turning When the piston 16 is turned by rotation of the cover 12. Figure 2 represents the parts in the position they are in when the cup is half' full of lubricant. As the lubricant is ej'ected from the cup the piston 16; together with all the parts connected therewith, are orced downwardly by the spring27'and gradually the piston is lowered until its lower end extends into the enlarged lower portion 42 of the passage 14. It will'benoted that the Wings 40 are tapered sothat when they pass into the enlarged portion 42'of the passage, a largerpassageway is providedwhichgradually increases as the plunger approaches its lowermost position. This compensates for the weakening of the compression spring 27 as 'it expands and the adjustment for a greater or lesser volume of grease or for difierence of' flow potential of different grades of lubricating grease may be made by turning the cover 12 as hereinbefore explained.

In order to ll the lubricator a nipple 43 having suitable securing projections 44' for a grease gun ismounted in an inlet passage 44 in the bottom' of cup 12. A ball Valve 45 is pressed by a spring 46 normally to close the outer end of the nipple 43 to prevent lubricant from coming out thru-this nipple. V

Mountedon the extension 22 is a Valve member 4-7 which reciprocates with the extension in the outlet' passage and' when in its upper position closes the inlet passage 44 thereby limiting the amount of lubricant which may be forced into the cup at one filling. This Valve: is provided with one or more apertures 48 providing passageways for lubricant between the cup and the bearing at all 'times but the Valve 47'prevents lubricant from' beingforced rapidly into the bearing by means of the gun filling the cups.

IniFigure 6 two lubricators, in accordance with this invention, are shown connected by'pipes 49 and 50 With a conduit 51 for simultaneous filling by means of a grease gun or filler 52 connected therewith. Any number of such Iubricators may be so connected for simultaneous filling from the conduit in which case the ball check Valve'45 will not be necessary except at the connection 53 for the filler 52. As each of the lubricator cups connected With the conduit 51 is lled its Valve member 47 closes its inlet and permits the operation of the filler 52 to proceed until the lubricators are all full as Will be indicated by the position ofthe extensions 21 in the casings 36. The substantial closing of the lubricators by Valve members 24 and 47 as they are lled effects a material Saving of lubricant especially in the event of a loose fitting bearing through which the lubricant might be forced and also insures a more even filling of all the connected lubricators.

Obvious changes in details and proportions of various parts may be resorted to Within the Scope of the invention.

What I claim is:

l.. In a lubricating device, a grease cup having a discharge passage, a removable piston reciprocable within the cup, pressure means operative upon-said piston' to force lubricant thru the discharge passage, and a control Valve reciprocably mounted in the discharge passage and connected with said piston to be moved thereby as the pistonn reciprocates within the cup to increase the size of the discharge passage as the piston moves downwardly withinthe cup, means to move the control Valve with respect to the piston When the l'atter is revolved and means for revolving said piston at will.

2. In a lubricating device, a grease cup having a discharge passage, a Control Valve within the discharge passage controlling the' rate of discharge of. the grease, a cover rotatably mounted on the cupand' having an aperture therein, and a member exten'ding thru the aperture in the cover to be rotated by'movement of the cover for adjusting the position of the Valve in the discharge passage of the cup.

3. In a lubricating device, a cup having a discharge passage, a spring pressed piston reciprocating in the cup to force lubricant thru the discharge passage, a Valve in said discharge passage, a cover rotatably mounted on the cup and having an aperture therein, and a member extending from the piston to reciprocate thru the aperture in the cover. and to be rotated by movement of the cover for adjusting the position of the Valve in the discharge passage of the cup, said cover having a fiange extending over the cup and provided With a series of depressions around its inner surface, a corresponding series of indicating characters on said flange, a spring'operated detent for engaging the depressions, and an index on the cup cooperative with said indicating characters whereby the setting of the cup for adjusting of' the control Valve will be visibly shown;

4. In a lubricating device, a grease cup having filling and discharge passages in one end thereof, a piston reciprocable Within the cup, pressure means operative-upon Said piston to force lubricant thru the dischargepassage, and a Valve movable with the piston to close only the filling passage when the cup is lled to the required amount;

'^ 5. In a lubricating device, a grease cup having a discharge passage, a piston in said cup, a control Valve in the discharge passage, a spring urging the piston to force grease thru the discharge passage, means visible from a distance for indicating the relative rate of flow of the grease and means connecting said first means to said Valve and piston to show the quantity of grease in the cup.

. 6. In a lubricating device, a grease cup having a'discharge passage, a piston having an indicating stem, means completely enclosing the stem, and a control Valve movable with the piston, said enclosing means being rotatable to adjust the position of the controlvalve with re- Spect to the piston to alter the rate of flow of the grease.

7. In a lubricating device, a grease cup having a valved entrance passage and a discharge passage, a piston reciprocating in the cup to discharge grease thru the discharge opening, and

a Valve automatically closing communication betWeen the inlet passage and the cup Chamber when the cup is filled With lubricant While at the same time providing a restricted opening permitting the fioW of grease from the cup Chamber thru the discharge passage.

8. In a lubricating device, a Chamber, a discharge passage, means for discharging lubricant from said *Chamber having a stem projecting into the discharge passage, a control Valve adjustably mounted on the stem, an inlet extending radially into the discharge passage, and a collar on said Stem and having openings therethru parallel to the aXis of the stem and having a Smooth peripheral surface to close the inlet opening.

9. A grease cup having an inlet opening and a discharge passage, a one-way Valve closing the inlet opening, a piston in the cup having a stem extending into the discharge passage, means for moving the piston to discharge the lubricant from the cup, a Valve movable With said stem to close the inlet opening, a control Valve adjustable On the stem to govern the rate of discharge of the grease, means for holding the control Valve against rotation, and means for rotating the Stem While the device is in use.

10. In a grease cup having a grease expelling means, a discharge passage, and an inlet passage communicating therewith, a. Stem extending into the discharge passage, a perforated cylindrical disk having a Smooth periphery and fitting the bore of the discharge passage, said disk being of such axial length as to close the entrance opening, and further means adjustably mounted With respect to the disk to govem the rate of flow of grease thru the discharge passage.

11. In a lubricating device having a main Chamber, a discharge passage in communication therewith for leading lubricant to a bearing to be lubricated and an entrance passageway Whereby lubricating material may be forced into the Chamber, a one-Way Valve -for preventing passage of lubricant from the Chamber thru the entrance passage, and means in the discharge passage for automatically ::losing onl the entrance passage When the Chamber is substantially full of lubricant.

12. The device of claim 11 in which the means is of less cross sectional area than the discharge passage so as to permit the flow of lubricant from the Chamber to the bearing in any position of said means.

13. A grease cup having an outlet passage, a reservoir, and a valved intake or filling passage, said filling passage leading directly into said outlet passage means for discharging grease from the reservoir thruthe outlet passage, and a Valve closing communication between the intake and outlet passages When 'the reservoir is filled to. a chosen extent. V

14. In alubrica'ting device, a grease cup having a discharge passage and a filling passage terminating in said discharge passage, a one-Way Valve in the filling passage, a piston reciprocable in the cup, pressure means operative upon said piston to force lubricant thru the discharge pas

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